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PDF TK83854MIMG Data sheet ( Hoja de datos )
| Número de pieza | TK83854MIMG | |
| Descripción | HIGH POWER FACTOR PREREGULATOR | |
| Fabricantes | TOKO | |
| Logotipo |  |
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TK83854
HIGH POWER FACTOR PREREGULATOR
FEATURES
s Control Boost PWM to 0.99 Power Factor
s Limit Line Current Distortion to < 5%
s Worldwide Operation without Switches
s Feed-Forward Line Regulation
s Low Noise Sensitivity
s Pin Compatible with UC2854, and UC3854
(Licensed Source)
DESCRIPTION
FEATURES (CONT.)
s Low Start-Up Supply Current
s Fixed-Frequency PWM Drive
s Low-Offset Analog Multiplier/Divider
s 1 Amp Totem-Pole Gate Driver
s Precision Voltage Reference
The TK83854 family of integrated circuits provide active
power factor correction for power systems that otherwise
would draw non-sinusoidal current from sinusoidal power
lines. These parts implement all the control functions
necessary to build a power supply preregulator capable of
optimally using available power-line current while
minimizing line-current distortion. To do this, the TK83854
contains a voltage amplifier, a precision analog multiplier/
divider, a current amplifier, and a fixed-frequency PWM. In
addition, the TK83854 contains a power MOSFET gate
driver, 7.5 V reference, line anticipator, load-enable
comparator, low supply detector, and overcurrent
comparator.
The TK83854 family uses average current-mode control to
accomplish fixed-frequency current control with stability
and low distortion. Unlike peak current-mode control,
average current control accurately maintains sinusoidal
line current without slope compensation.
circuitry that supplies power to this device, the TK83854
family features low start-up supply current.
These devices are available in 16-pin plastic dual in-line
(DIP) and 16-pin surface mount (SOP) packages.
83854
SOP-16
83854
DIP-16
TK83854
GND
PKLMT
CAOUT
ISENSE
MULTOUT
IAC
VAOUT
VRMS
GTDRV
VCC
CT
SS
RSET
VSENSE
ENA
Vref
The TK83854's high reference voltage and high oscillator
amplitude minimize noise sensitivity while fast PWM
elements permit chopping frequencies above 200 kHz.
The TK83854 can be used in systems with line voltages
that vary from 75 to 275 V and with line frequencies across
the 50 Hz to 400 Hz range. To reduce the burden on the
ORDERING INFORMATION
TK83854
Package Code
Tape/Reel Code
Extended Temp. Range
BLOCK DIAGRAM
VCC
16/10 V
ENA
2.5/2.25 V
7.5 V
VSENSE
IAC
VRMS
SS
14 µA
VAOUT MULTOUT CAOUT PKLMT
Vref
VCC
IM =
AB
C
A
7-5 V
REF
RUN
IC POWER
15 V
GTDRV
B
X2 C
RUN
OSC
R
RQ
S
PACKAGE CODE
D: DIP-16
M: SOP-16
TEMP. RANGE (OPTIONAL)
I: -40 TO +85 C
TAPE/REEL CODE
TL: Tape Left
MG: Magazine
January 1999 TOKO, Inc.
ISENSE
CT RSET
1
GND
Page 1
1 page  
PKLMT
NC
CAOUT
IAC
MULTOUT
NC
VAOUT
VRMS
10 k
10 k
10 k
10 nF
10 k 100
10 nF
10 k
TK83854
TEST CIRCUIT
0.1 nF
GND
PKLMT
CAOUT
ISENSE
MULT
IAC
B
A
VAOUT
7.5 V
IM = (AB) / C
C
V RMS
GTDRV
VCC
CT
SS
RSET
VSENSE
ENA
Vref
0.39 nF
1.0 nF
1.0 nF
0.01 nF
8.2 k
10 k
15 k
100
10 µF
NC
VCC
ENA
NC
0.1 µF
TYPICAL PERFORMANCE CHARACTERISTICS
TA = TJ = 25 °C
CURRENT AMPLIFIER GAIN AND
PHASE vs. FREQUENCY
120
100
PHASE MARGIN
VOLTAGE AMPLIFIER GAIN AND
PHASE vs. FREQUENCY
120
100
PHASE MARGIN
GATE DRIVE MAXIMUM DUTY
CYCLE vs. RSET
100
95
80
60
40
20
OPEN LOOP GAIN
0
80
60
40
20
OPEN LOOP GAIN
0
90
85
80
75
-20
0.1
1 10 100 1000 10000
FREQUENCY (kHz)
-20
0.1
1 10 100 1000 10000
FREQUENCY (kHz)
70
0
10
RSET (kΩ)
100
MULTIPLIER OUTPUT vs.
VOLTAGE ON MULTIPLIER
600
VAOUT = 5 V
V(rms) = 2 V
MULTOUT = 0 V
400
MULTOUT = 1 V
MULTOUT = 2 V
200
MULTOUT = 3 V
0
0 200 400 600 800
IAC (µA)
1000
OSCILLATOR FREQUENCY VS.
RSET AND CT
100 pF
100
200 pF
500 pF
10
1 nF
2 nF
10 nF 5 nF 3 nF
1
1 10 100
RSET (kΩ)
GATE DRIVE RISE AND FALL TIMES
vs. LOAD CAPACITANCE
700
500
300
FALL TIME
RISE TIME
100
0 .01 .02 .03 .04 .05
CLOAD (µF)
January 1999 TOKO, Inc.
Page 5
5 Page 
APPLICATION INFORMATION (CONT.)
TK83854
D9
F1
6A
C1
0.47 µF
TH1
KC015L
Q3
ZVN4206A
R21
24 K
BR
1KBU8J
~+
~-
C5
0.47 µF
R23
470 K
R22
30 K
Q2
D5
1N4148
D3
TIP50GE
D11 MUR110
C14
0.1 µF
1N4746A
R20
3K
C17
0.1 µF
D12
MUR110
1N5406
L1
1 mH
D2
MUR860
+
C2
Q1 330 µF
R1 IRF840
0.25
R3
3.9 K
D13 1N4148
R7
240 K
C6 0.047 µF
R2 C15 680 pF R4
3.9 K
1.6 K
C13
D7 68 pF
R6
24 K
C3 270 pF
1N5817
D8 1N5817
C4 1 µF
D10 1N4737
R29 10 K
R17
511 K
R18
10 K
VOUT
385 VDC
R16
20
R25
910 K
R8
910 K
R28
220 K
R9
91 K
R27
8.2 M
16 V
VCC
R13
75 K
ENA
R12
27 K
2.5 V
7.5 V
VSENSE
IAC
VRMS
SS
14 µA
VAOUT MULTOUT
ISENSE
IM =
AB
C
A
B
X2 C
ILIMIT
PKLMT
Vref VCC
7-5 V
REF
IC POWER
RUN
15 V
D4
1N5821
GTDRV
R
RQ
S
R10
20 K
C12
0.1 µF
C7
0.47 µF
C16
1 µF
+
C9
220 µF
C10
0.01 µF
RUN
OSC
CT
C11
1000 pF
RSET
R14
15 k
1
GND
FIGURE 1: 250 W PREREGULATOR
January 1999 TOKO, Inc.
Page 11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet TK83854MIMG.PDF ] | |
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